U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
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Illinois ZIP Codes

Complete postal directory, details, and geographic map for the State of Illinois.

State ZIP Code City County Area Codes
IL 61942 Newman Douglas County 217, 447
IL 61943 Oakland Coles County 217, 447
IL 61944 Paris Edgar County 217, 447, 765, 812, 930
IL 61949 Redmon Edgar County 217, 447
IL 61951 Sullivan Moultrie County 217, 447
IL 61953 Tuscola Douglas County 217, 447
IL 61955 Vermilion Edgar County 217, 447
IL 61956 Villa Grove Douglas County 217, 447
IL 61957 Windsor Shelby County 217, 447
IL 62001 Alhambra Madison County 618
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.